Unresolved reference: NavArgs after added some arguments to destination

Question

I'm working on a small project and trying to use the new navigation architecture components. When i'm trying to add some arguments to a destination i got "Unresolved reference: NavArgs" error.

I followed this guide https://developer.android.com/topic/libraries/architecture/navigation/navigation-pass-data#kotlin and already added

classpath "android.arch.navigation:navigation-safe-args-gradle-plugin:1.0.0-alpha11"

to my project gradle file and also added

apply plugin: 'androidx.navigation.safeargs.kotlin'

to my app gradle file.

As seen in the guide above i want to use val args: AddKittenFragmentArgs by navArgs() to get the passed arguments. But navArgs() isn't recognized.

Also NavArgs in the generated code isn't resolved.

data class MyFragmentArgs(val argOne: String? = "\"\"", val argTwo: String? = "\"\"") : NavArgs

score 17 · Answer 1 · answered Aug 21 '21 at 13:01

17

In my case i typed the argument Name starting by a capital letter

        <argument
            android:name="MyArgument" // changed it to myArgument fix the problem
            app:argType="string"
            app:nullable="false" />

answered Aug 21 '21 at 13:01

Hussien Fahmy

1,119
6
24

score 12 · Accepted Answer · answered Jan 24 '19 at 21:53

As per the documentation on that very page:

When using the -ktx dependencies, Kotlin users can also use the by navArgs() property delegate to access arguments.

Make sure you are following the Adding Components documentation and using the navigation-fragment-ktx dependency:

implementation "android.arch.navigation:navigation-fragment-ktx:1.0.0-alpha11"

score 9 · Answer 3 · answered Jan 23 '21 at 13:16

i had the same problem and i solved this by doing following steps

Build -> Clean Project
delete argument from nav_graph.xml file
create new argument
Build -> Rebuild Project
set the argument

val action: NavDirections = AreThereAnyDecayedTeethInTheAreaOfPainFragmentDirections
                .actionAreThereAnyDecayedTeethInTheAreaOfPainFragmentToResultFragment(
                    finalresult = "somethings"
                )

use this argument on FragmentDest

        arguments.let {
            binding.board.text = ResultFragmentArgs.fromBundle(it!!).finalresult
        }

score 6 · Answer 4 · answered Feb 10 '19 at 21:43

I had the same problem until I realized the navigation component's project dependencies were using a different version than the one specified by the plugin (in the classpath).

i.e. In the project's build.gradle

classpath 'android.arch.navigation:navigation-safe-args-gradle-plugin:1.0.0-beta01'

in the app build.gradle

// Navigation
implementation 'android.arch.navigation:navigation-fragment-ktx:'+ rootProject.navigationVersion
implementation 'android.arch.navigation:navigation-ui-ktx:' + rootProject.navigationVersion

where navigationVersion was

ext {
   ...
   navigationVersion = "1.0.0-alpha08"
}

lint doesn't tell you there's an update to a library when the dependency is interpolated.

score 4 · Answer 5 · answered Jun 28 '19 at 07:34

4

I solved this by doing Clean Project from Build menu of Android Studio.

Go to Menu : Build >> Clean Project

answered Jun 28 '19 at 07:34

Yogesh Umesh Vaity

41,009
21
145
105

1

I also had all the solutions mentioned above in place thought this is hat solved my problem. – nyxee Jan 01 '20 at 21:25

score 3 · Answer 6 · answered Jan 02 '23 at 07:30

3

Had the same issue I used "setStartDestination(.." and now it works, instead of using the property access syntax i.e "startDestination=..."

answered Jan 02 '23 at 07:30

Abhishek C. Gidde

135
1
8

Same with me i used setStartDestination() instead of startDestination it works. – Adam Noor Feb 14 '23 at 07:49

score 1 · Answer 7 · answered Feb 08 '20 at 11:25

1

just fyi if you want to pass String your argType should be string instead of String.

 app:argType="string"

answered Feb 08 '20 at 11:25

Ege Kuzubasioglu

5,991
12
49
85

Was the the issue for OP? – IgorGanapolsky Mar 04 '20 at 17:18
5

@IgorGanapolsky No, but it can be an issue for someone else – Ege Kuzubasioglu Jun 02 '20 at 10:12

score 1 · Answer 8 · edited Feb 09 '23 at 11:46

1

In my case I need to added this it in my build.gradle (app)

kotlinOptions {
    jvmTarget = JavaVersion.VERSION_1_8.toString()
}

edited Feb 09 '23 at 11:46

dzaralica69

3
2

answered May 26 '21 at 16:57

Álysson Alexandre

1,167
1
8
12

score 0 · Answer 9 · answered Apr 07 '19 at 06:49

0

Latest release version 1.0.0 seems to have fixed this issue. Just change the navigation dependency version to 1.0.0 along with adding the -ktx dependencies as mentioned in other answers and everything should work.

answered Apr 07 '19 at 06:49

Ezio

2,837
2
29
45

score 0 · Answer 10 · answered Jun 05 '22 at 19:04

Step 1: Make it sure that your AndroidManifest.xml is containing package name like that -

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.my.app">

Step 2: Use the latest version from here.

Step 3: Clean build the project.

Step 4: Rebuild the project.

score 0 · Answer 11 · answered Dec 13 '22 at 08:34

0

I also faced this issue adding id 'androidx.navigation.safeargs.kotlin' this plugin in the corresponding gradle file fixed the issue. We need to clean build once this plugin is added.

answered Dec 13 '22 at 08:34

Dev

139
2
3

Unresolved reference: NavArgs after added some arguments to destination

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